Could be bad primers. Depending on how they were stored/shipped something could have happened to them. Did you try to hit then again? If they fire on the second strike, it is usually a seating depth problem.

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Could be bad primers. Depending on how they were stored/shipped something could have happened to them. Did you try to hit then again? If they fire on the second strike, it is usually a seating depth problem.

I'm relatively new to reloading too, (about 5 years now)
Maybe this is a dumb question, but did you check to make sure your flash hole was clear of obstruction?
Sometimes I see that there is a little bit of polishing matter left in my cases after tumbling.

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I'm relatively new to reloading too, (about 5 years now)
Maybe this is a dumb question, but did you check to make sure your flash hole was clear of obstruction?
Sometimes I see that there is a little bit of polishing matter left in my cases after tumbling.

This was new brass and, therefore, hadn't been tumbled. Thanks though.